Php session 3 Important topics

ENG / Mohamed Saad pamicloud.com
 Include Statement
 Code Reuse
 Require Statement
 Case Study


Include PHP Statement
Include statement are used to include
the contents of one PHP file within
another PHP file.
Contents are treated as PHP Code.
Include Statement Syntax
Include ‘header.php’
Include (‘header.php’);


 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta name="description" content="Free Learning Session , learn wherever you are whenever
you want.keep learning">
 <meta name="author" content="pamicloud.com">
 <title>Home | PamiCloud</title>
 
 <link rel="shortcut icon" href="imgs/pami.png">
 <link rel="apple-touch-icon-precomposed" sizes="144x144" href="img/pami.png">
 <link rel="apple-touch-icon-precomposed" href="img/pami.png">
 </head>
 <body>
 <h1>Welcome to Pami Cloud dot com</h1>


<?php include "header.php"?>
<hr />
<img src="imgs/pami.png"
title="pamicloud.com" alt="pamicloud" /><br
/>
<h3><a
href="http://pamicloud.com">pamicloud</a><
/h3>
</body>
</html>

 <?php include "header.php"?>
 <hr />
 <img src="imgs/pami.png" title="pamicloud.com" alt="pamicloud" /><br />
 <h3><a href="http://pamicloud.com">pamicloud</a></h3>
 <form action="process.php" method="post">
 <input type="text" name="username">
 </form>
 <hr>
 <h1>submit to same page</h1>
 <form action="process.php" method="post">
 Username : <input type="text" name="username"><br>
 <input type="submit" name="login">
 </form>
 <?php
 if(isset($_POST['login'])){
 //process
 echo $_POST['username'];
 print_r($_POST);
 }
 ?>
 </body>
 </html>


 Can not include any file at all…!?
 The behavior of these functions is affected by
settings in php.ini.
allow_url_fopen "1"
allow_url_include "0"


 Can not include any file at all…!?
 The behavior of these functions is affected by
settings in php.ini.
ini_set("allow_url_fopen", "On");
php_value allow_url_fopen On


Sets the value of the given configuration option.
The configuration option will keep this new value
during the script's execution, and will be restored
at the script's ending.
<?php
echo ini_get('display_errors');
if (!ini_get('display_errors')) {
ini_set('display_errors', '1');
}
echo ini_get('display_errors');
?>
ini_get() - Gets the value
of a configuration option.


Gets all configuration options 

<a href=“http://yourdomain.com?user=saad”>
Print user name</a>
<?php If ( isset ($_GET[‘user’]) )
{echo ($_GET[‘user’];}
?>


<a href=“http://yourdomain.com?user=saad&pass=asdfg”>
Print user data</a>
<?php If ( isset ($_GET[‘user’]) )
{print_r($_GET);}
?>


URL have specific syntax rules.
Only :
 Uppercase & lowercase Characters.
 Underscores.
 Tildes
 Hyphens
 Decimal digits
Spaces should be removed
Pami Cloud-> Pami+Cloud


 Used in Comparison Operator .
 It`s mean true or false.
 We already know
 String.
 Integer.
 Float.
TRUE or false
Not case sensitive
All upper or all lower


 The special data type is used for variables
that have no data assigned to them.
 A variable can be NULL if:
 No value assigned to it.
 The variable has been unset
$X == NULL
Correct syntax to Compare with NULL


 PHP a weak-typed language meaning it does
not require data type.
 Value will determine variable data type.
 Type juggling process or automatic type
conversion.
Juggling Process Called Type Casting


 Error:
 Handling.
 Reporting.
 Control Operator.


 Php.ini directive error_reporting is used to set which type of
error PHP have to catch .
 (predefined config constants)
 E_ERROR(int)
 Run time - Fatal error , can not be recovered.
 E_WAENING
 Run time – execution of the script is completed.
 E_PARSE
 Compile time – parse errors


 PHP provide an error control operator @,
which is used to supress errors generated by
expressions.
 It`s Un-array operator.
 $php_errormsg variable stores last error


 Php.ini directive error_reporting is used to set
which type of error PHP have to catch .
 (predefined config constants)

 Register_globals is a configuration directive
that automatically creates global variables.
 $_GET[‘name’] however if register_globals
was set to on php automatically create
variable with global scope called $name;
 But it`s Deprecated from php since ver 5.3.0.


 MeanTurned off by default.


 Equality: ==
 in Equality :!=
 Identity :===TRUE if have same Key/Value of the same
type
 Not-identity :!==
 The Union operator + used to append any mew key/value pairs in
the end of the array.


 Var var are variable that can be
defined dynamically with PHP scripts.
 Example
$x=“user”
$$x = $user


 __LINE__ :current exe line number.
 __FILE__ :absolute path to script being exe.
 __DIR__ :absolute directory of script been
exe.
 __FUNCTION__ :name of the function
currently exe.


 PHP Provide the exit() construct which
can used to terminate the execution of
a script.
 Die() is just another name


 Location HTTP Header:
header(“Location: http://cx.com”);
You must call header function before
any generated output 

Case Study
Solution
From PHP Configuration directives php.ini:
Turn Output buffer on , It`s off by default.
Output_buffering=On

Case Study
Solution
At the first beginning of your code:
Ob_start();

ThankYou
End of PHP SESSION 4
ENG / Mohamed Saad pamicloud.com


Php session 3 Important topics

More Related Content

What's hot

Viewers also liked

Similar to Php session 3 Important topics

More from mohamedsaad24

Recently uploaded

Php session 3 Important topics